Initial analysis: Phase 9.5 HTTP Server implementation plan

Co-authored-by: moe-charm <217100418+moe-charm@users.noreply.github.com>

test_async_simple.nyash

@@ -0,0 +1,12 @@
+// Simple async test with proper variable declarations
+static box Main {
+    init { result }
+    
+    main() {
+        local f1
+        nowait f1 = 42
+        me.result = await f1
+        print(me.result)
+        return me.result
+    }
+}